我发布这个答案是因为我的Virtualmin/Webmin管理界面决定禁用我的PHP引擎是一个好主意。我花了一段时间才找到解决方案，所以我想和你们分享一下:

同时，确保你的网站配置文件中没有任何与这个特定主机或虚拟主机相关的php_admin_value在它们中关闭PHP，就像这样:

php_admin_value engine Off

有疑问的时候，评论一下…

# php_admin_value engine Off

并重新启动您的web服务器。

确保脚本包含

<?php

在应该执行的代码之前。<?之间不能有空格这里是PHP。

我在High Sierra (OS X 10.13.5)附带的php 7.1上遇到了这个问题，编辑/etc/apache2/httpd.conf进行以下更改有帮助:

取消注释这行 LoadModule php7_module libexec/apache2/libphp7.so 将下面的粘贴到末尾 < IfModule php7_module > AddType application/x-httpd-php .php AddType application/x-httpd-php-source .php < IfModule dir_module > DirectoryIndex index.html index.php < / IfModule > < / IfModule >

我通过卸载XAMPP并安装WAMP解决了这个问题。 谢谢你的帮助。

注意，对于PHP 7用户，添加到你的httpd.conf文件:

# PHP 7 specific configuration
<IfModule php7_module>
    AddType application/x-httpd-php .php
    AddType application/x-httpd-php-source .phps
    <IfModule dir_module>
        DirectoryIndex index.html index.php
    </IfModule>
</IfModule>

听起来你的配置好像有问题，下面是一些你可以检查的东西:

Make sure that PHP is installed and running correctly. This may sound silly, but you never know. An easy way to check is to run php -v from a command line and see if returns version information or any errors. Make sure that the PHP module is listed and uncommented inside of your Apache's httpd.conf This should be something like LoadModule php5_module "c:/php/php5apache2_2.dll" in the file. Search for LoadModule php, and make sure that there is no comment (;) in front of it. Make sure that Apache's httpd.conf file has the PHP MIME type in it. This should be something like AddType application/x-httpd-php .php. This tells Apache to run .php files as PHP. Search for AddType, and then make sure there is an entry for PHP, and that it is uncommented. Make sure your file has the .php extension on it, or whichever extension specified in the MIME definition in point #3, otherwise it will not be executed as PHP. Make sure you are not using short tags in the PHP file (<?), these are not enabled on all servers by default and their use is discouraged. Use <?php instead (or enable short tags in your php.ini with short_open_tag=On if you have code that relies on them). Make sure you are accessing your file over your webserver using an URL like http://localhost/file.php not via local file access file://localhost/www/file.php

最后，查看PHP手册以获得更多的设置技巧。